Measurement equipment-independent quantum direct communication method

A technology of measuring equipment and communication methods, which is applied in the field of quantum information and optical communication, can solve problems such as difficult practical application and immature quantum storage technology, and achieve the effect of eliminating dependence

Inactive Publication Date: 2021-11-05
NAT QUANTUM COMM GUANGDONG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The security of quantum-safe direct communication depends on the block transmission of data, and the block transmission ...

Method used

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  • Measurement equipment-independent quantum direct communication method
  • Measurement equipment-independent quantum direct communication method
  • Measurement equipment-independent quantum direct communication method

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Embodiment 2

[0071] The difference between embodiment 2 and embodiment 1 is that the safety detection steps are as follows, and the safety detection steps of this implementation are as follows:

[0072] Step A. The Alice prepares a random single-photon state in one of the following four quantum states {|0>,|1>,|+>,|->}; the Bob randomly prepares a single photon state in the following four quantum states A single-photon state qubit of one of {|0>,|1>,|+>,|->}; the single-photon state qubit is used for eavesdropping detection;

[0073] Step B. Alice and Bob send their qubits to Charlie at the same time;

[0074] Step C. After Charlie receives the qubits sent by Alice and Bob, he performs the Bell state measurement, and then publishes the measurement results through the classical channel;

[0075] Step D: Alice notifies Bob through a classical channel, and both Alice and Bob announce their respective prepared quantum states, and then perform eavesdropping detection similar to the measurement...

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Abstract

The invention discloses a measurement equipment-independent quantum direct communication method, which comprises the following steps of: randomly preparing an entangled quantum bit in a two-photon state through Alice, and randomly preparing a quantum bit in a single-photon state in one of four quantum states of {|0>, 1>, |+> and |->} through Bob; the Alice sends the quantum bit of one photon in the entangled state to the Charlie and keeps the quantum bit of the remaining entangled state of one photon, and the Bob sends the randomly prepared quantum bit of the single photon state to the Charlie; after the Charlie receives the quantum bits sent by the Alice and the Bob, Bell state measurement is executed, then a measurement result is published through a classical channel, and the Alice executes unitary operation to complete quantum teleportation. According to the coding mode, quantum storage can be removed.

Description

technical field [0001] The invention relates to the technical field of quantum information and optical communication, in particular to a measurement device-independent quantum direct communication method. Background technique [0002] Quantum communication uses physical principles to ensure the unconditional security of communication information. At present, there are many internationally popular quantum communication protocols, including quantum key distribution, quantum key distribution (QKD) and quantum secure direct communication, quantum secure direct communication (QSDC), etc. . QKD uses quantum states to transmit keys, while QSDC transmits confidential information directly in quantum channels. [0003] In measurement device-independent quantum secure direct communication, there are mainly two steps of eavesdropping detection: the first step is called security detection, which is used to detect whether there is an eavesdropper in the communication; the second step is ...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04B10/70H04B10/85H04B10/079
CPCH04L9/0858H04B10/70H04B10/85H04B10/079
Inventor 李相洁龙桂鲁胡敏郭邦红
Owner NAT QUANTUM COMM GUANGDONG CO LTD
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